Our blood vessels need to dilate effectively when our tissues require more blood flow, such as during exercise or under stressful conditions. Our health may suffer if blood vessels are not as elastic as they should be. Nitric oxide synthesis is crucial to the health of blood vessels. Our blood arteries are more elastic, normal blood pressure may be maintained, and cardiovascular health is improved when enough nitric oxide is created in them. Thorne supplements raise the body's nitric oxide production, which supports healthy blood vessels.